Electronic keyboard instrument



FIG. 1 is a perspective view of an electronic keyboard instrument showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is another perspective view thereof.

The broken lines shown in FIGS. 1, 2, 7 and 8 represent stitching. 

The ornamental design for a electronic keyboard instrument, as shown and described. 